Shanxi desulfurization tower manufacturer introduces that during the normal production process of boiler flue gas desulfurization tower, the tower pressure difference is around 15K Pa, and the pressure difference is relatively stable. If there is a significant fluctuation in the pressure difference of Shanxi flue gas desulfurization tower, timely inspection should be carried out. When the pressure exceeds 35K Pa and gradually increases, it is necessary to reduce the gas volume and circulation volume in a timely manner. If the reduction is small, it will cause the desulfurization tower to block the liquid, and the NHD solution will be brought into the rear system with the gas. The liquid level of the desulfurization system will fluctuate greatly, and the H2S index in the desulfurization effluent gas will deteriorate severely, even forcing the shutdown. Due to the fact that H2S can react with the active components of methane and ammonia catalysts to form metal sulfides, the activity of the catalyst is reduced or even lost. Therefore, controlling the high pressure difference is necessary to ensure that the H2S index of the gas emitted from the desulfurization tower meets the standard, and to ensure the stable operation of the system under high load. At the same time, the control of the H2S index emitted from the desulfurization tower is also directly related to the service life of the desulfurizer in the dry desulfurization tank.